Air conditioning knocking noise

beachguard · 06-09-2012, 07:43 PM

Check your in-cabin air filter behind the glove box. It may have come slightly unseated and the fan may be hitting it causing the clicking.

dirtrat · 09-23-2012, 10:15 AM

I'm having this EXACT same problem. I did change my air cabin filter a few weeks ago with a non-nissan filter but it was very non-eventfull until now. When i turn on the fan I don't have the problem. As soon as I turn on the AC, it starts making the clunking/knocking noise in the glove box area. Should I bring the car to the dealer for warranty repair. I can't understand how the cabin filter could cause this since the fan running full speed has no issues.

chubbs · 08-17-2020, 01:12 PM

I know this thread is 8 years old, but I've developed exactly the same problem with my 2016 car.

When the air conditioning is on 'recirculate' I get a loud knocking noise coming from inside the centre of the dashboard. It seems to be a fan hitting something.

When I turn 'recirculate' off, the noise stops.

Could a fan be hitting some kind of flap? Did anyone find out what causes this knocking noise?

06-09-2012, 07:43 PM	#1 (permalink)
beachguard Base Member Join Date: Jan 2010 Location: Gainesville, FL Posts: 5 Drives: 10 370Z M6 Sport Pk Rep Power: 16	Check your in-cabin air filter behind the glove box. It may have come slightly unseated and the fan may be hitting it causing the clicking. chubbs likes this.

08-17-2020, 01:12 PM	#3 (permalink)
chubbs A True Z Fanatic Join Date: Jan 2009 Location: Zeeland Posts: 1,046 Drives: 2016 370z Auto-Grey Rep Power: 7587	I know this thread is 8 years old, but I've developed exactly the same problem with my 2016 car. When the air conditioning is on 'recirculate' I get a loud knocking noise coming from inside the centre of the dashboard. It seems to be a fan hitting something. When I turn 'recirculate' off, the noise stops. Could a fan be hitting some kind of flap? Did anyone find out what causes this knocking noise? __________________ . '03 Grey >>> '06 Black >>>'10 Silver >>> '16 Grey ^

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09-23-2012, 10:15 AM	#2 (permalink)
dirtrat Base Member Join Date: Dec 2010 Location: Sacramento Posts: 170 Drives: 2011 370Z/Touring/Sp Rep Power: 15	I'm having this EXACT same problem. I did change my air cabin filter a few weeks ago with a non-nissan filter but it was very non-eventfull until now. When i turn on the fan I don't have the problem. As soon as I turn on the AC, it starts making the clunking/knocking noise in the glove box area. Should I bring the car to the dealer for warranty repair. I can't understand how the cabin filter could cause this since the fan running full speed has no issues.